Note to Admin that must be reordered

In Modified and also its predecessor shop versions, there has been a function "Note to admin if stock is below X" for ages, but it was never completed.

We are finishing this function and adding attributes to it:

1. if the main stock of a product drops below X, send an email to the admin that it needs to be reordered.
2. if an attribute stock drops below Y, send an email to the admin that it needs to be reordered.

For example, if you don't want to have emails for attributes, but only for products, then you could simply enter -99999 in the configuration - see image.